CBSE Class 12 Chemistry Question Paper 2022 Set 02 Solved

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Class 12 Chemistry Solved Question Papers: CBSE Class 12 Chemistry Question Paper 2022 Set 02 Solved

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SECTION A
 
1. Which among the following undergoes SN1 faster and why? 
CBSE Class 12 Chemistry Question Paper 2022 Set B Solved 1
 
2. Explain how vacancies are introduced in ionic solid when a cation of higher valence is added as an impurity in it.
 
3. Arrange the following polymers in increasing order of their intermolecular forces: Nylon-6,6, Buna-S, Bakelite
 
4. Write the IUPAC name of [Fe(en)2Cl2]Cl
OR
What are ambidentate ligands?
 
5. What do you understand by the term peptization?
OR
Why is adsorption exothermic in nature?
 
SECTION B
 
6. Name the reagent(s) used in the following conversions
a) Phenol to 2,4,6-trinitropehnol
b) Anisole to 4-Methoxytoluene
 
7. Write the structure of major product of the following reactions:

CBSE Class 12 Chemistry Question Paper 2022 Set B Solved 2

8. Write the structures of the monomers of the following polymers:
(a)Neoprene (b) Bakelite
 
9. a) Define molal elevation constant (Kb)
b) Why are the molecular masses of polymers determined by osmotic pressure method?
 
10. Draw the structures of following: XeO3, H2S2O8 2
 
11. Complete the following equations
a) Fe2+ + Cr2O72- + H+→
b) MnO4 — + S2O3 2-+H2O→
OR
Explain the preparation of potassium permanganate from pyrolusite ore.
 
12. Show that the half-life of a first order reaction is independent of the initial concentration of the reactants.
 
SECTION C
 
13. An element crystallizes in fcc with edge length 200 pm. Calculate its density if 200grams of this element contains 24x 1023 atoms. [Na=6.023x1023]
 
14. a) Which of the following is more stable complex and why?
[Co(NH3)6]3+ and [Co(en)3]3+
b) Why is [NiCl4]2- paramagnetic but [Ni(CO)4] is diamagnetic?
c) On the basis of crystal filed theory, write the electronic configuration of d4 ion,in an octahedral field when Δo˃P.
 
15. Write chemical equations when
a) Ethyl chloride is heated with silver fluoride
b) Chlorobenzene is treated with CH3COCl in the presence of anhydrous AlCl3
c) Benzyl alcohol is treated with thionyl chloride
OR
Account for the following
i) Ethyl iodide undergoes faster SN2 than ethyl bromide
ii) p-dichlorobenzene has higher melting point than those of ortho or meta isomers
iii) Haloarenes are less reactive to nucleophiles
 
16. 2g of benzoic acid dissolved in 25g of benzene shows a depression in freezing point equal to 1.62K. What is the percentage association of acid if it forms dimer in solution? [Given Kf for benzene 4.9K kg/mol, molar mass of benzoic acid=122g/mol, molar mass of benzene=78g/mol]
 
17. Explain what is observed when
a) An electric current is passed through a sol
b) A beam of light is passed through a sol
c) An electrolyte is added to ferric hydroxide sol
OR
Write one difference between
i) Lyophobic and lyophilic colloids
ii) Heterogenous and homogenous catalysis
iii) Macromolecular and associated colloids
 
18. a) Why is the reduction of a metal oxide easier if the metal formed is in the liquid state at the temperature of reduction?
b) Describe with equations, the principle of vapour phase refining of zirconium.
 
19. What happens when D-glucose is treated with
a) HI b) NH2OH c) Br2 water
OR
What are fibrous and globular proteins? Give an example each.
 
20. Mention the action of the following on the human body in bringing relief from a disease
a) Cimetidine
b) Chloramphenicol
c) Aspirin
 
21. Give reason for the following
a) Of the d4 species, Cr2+ is strongly reducing whereas Mn3+ is strongly oxidizing
b) Cu+ ion is not stable in aqueous solutions
c) Transition metals generally form colored compounds.


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The CBSE Class 12 Chemistry Question Paper 2022 Set 02 Solved is available for download on StudiesToday.com. It includes complete set with all sections so that Class 12 students can practice with the exact same paper that came in the CBSE exams.

Are the solutions for CBSE Class 12 Chemistry Question Paper 2022 Set 02 Solved based on the official CBSE marking scheme?

Yes, the solutions for CBSE Class 12 Chemistry Question Paper 2022 Set 02 Solved are prepared by subject matter experts as per official marking scheme. Class 12 students will understand the structure of answers and 'step-marks' methodology Chemistry.

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